B. Aspirin causes less stomach upset than salicin.
<em>The order of the four activities in the physical activity pyramid from top to bottom would be:</em>
<em>1. Homework</em>
<em>2. Weight training</em>
<em>3. Soccer practice</em>
<em />
<em>4. Walking 30 minutes to school</em>
<em>The physical activity pyramid lists the least to most recommended activity options from top to bottom (refer to the attached image). Thus, homework would be on top, since, it involves sitting. Next would be weight training, since it is a strength activity, followed by soccer (a recreational activity), and finally, walking for 30 minutes.</em>
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Hereditary diseases are passed from one generation to the next through the human gene structure called DNA.
